add Jenkinsfile for stage_2 devops build

Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>

Jenkinsfile

+properties([
+    parameters([
+        string(defaultValue: env.BRANCH_NAME, description: '', name: 'GERRIT_BRANCH'),
+        string(defaultValue: 'osm/devops', description: '', name: 'GERRIT_PROJECT'),
+        string(defaultValue: env.GERRIT_REFSPEC, description: '', name: 'GERRIT_REFSPEC'),
+        string(defaultValue: env.GERRIT_PATCHSET_REVISION, description: '', name: 'GERRIT_PATCHSET_REVISION'),
+        string(defaultValue: 'https://osm.etsi.org/gerrit', description: '', name: 'PROJECT_URL_PREFIX'),
+        booleanParam(defaultValue: false, description: '', name: 'TEST_INSTALL'),
+        string(defaultValue: 'artifactory-osm', description: '', name: 'ARTIFACTORY_SERVER'),
+    ])
+])
+
+def devops_checkout() {
+    dir('devops') {
+        git url: "${PROJECT_URL_PREFIX}/osm/devops", branch: params.GERRIT_BRANCH
+    }
+}
+
+node('docker') {
+    checkout scm
+    devops_checkout()
+
+    ci_stage_2 = load "devops/jenkins/ci-pipelines/ci_stage_2.groovy"
+    ci_stage_2.ci_pipeline( 'devops',
+                           params.PROJECT_URL_PREFIX,
+                           params.GERRIT_PROJECT,
+                           params.GERRIT_BRANCH,
+                           params.GERRIT_REFSPEC,
+                           params.GERRIT_PATCHSET_REVISION,
+                           params.TEST_INSTALL,
+                           params.ARTIFACTORY_SERVER)
+}